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首页> 外文期刊>Journal of Clinical and Diagnostic Research >A Comparative Evaluation of the Linear Dimensional Changes of Two Different Commercially Available Heat Cure Acrylic Resins during Three Different Cooling Regimens
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A Comparative Evaluation of the Linear Dimensional Changes of Two Different Commercially Available Heat Cure Acrylic Resins during Three Different Cooling Regimens

机译：三种不同冷却方式下两种不同市售热固化丙烯酸树脂线性尺寸变化的比较评估

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Introduction: Close mucosal adaptation of denture base to the underlying mucosa is of prime importance for denture stability. This however can be affected by various temperature changes which the denture base undergoes during processing and also to its material properties.Aim: The aim of the present study was to compare linear dimensional change of heat cure acrylic resin with three different cooling regimens on two different commercially available acrylic denture base resins.Materials and Methods: Six groups of acrylic specimens with 10 samples each were prepared using either PYRAX or DPI acrylicresin, with a standard processing technique. Three different cooling methods were used for both the commercially available heat cure acrylic denture base resins. Linear dimensional changes were measured between three pre-determined points on the specimens of all the groups using a travelling microscope after removing the sample from the flask. One way ANOVA and unpaired t-test was used for statistical analysis.Results: Linear dimensional change was more in quenching followed by air and water bath method of cooling respectively. Amongst the materials, linear dimensional changes were more in PYRAX than in DPI acrylic.Conclusion: Slow cooling by methods described should be advocated for better mucosal adaptation of the denture base.
机译：简介：义齿基托与基础黏膜的紧密粘膜适应性对义齿稳定性至关重要。然而，这可能会受到义齿基托在加工过程中经历的各种温度变化及其材料性能的影响。目的：本研究的目的是比较两种不同冷却方式下三种固化方式的热固化丙烯酸树脂的线性尺寸变化。材料和方法：采用标准加工技术，使用PYRAX或DPI丙烯酸树脂制备六组丙烯酸样品，每组10个样品。对于市售的热固化丙烯酸义齿基料树脂，使用三种不同的冷却方法。从烧瓶中取出样品后，使用行进显微镜在所有组的样品的三个预定点之间测量线性尺寸变化。结果：淬火后的线性尺寸变化更大，其次是空气和水浴冷却。在这些材料中，PYRAX的线性尺寸变化比DPI丙烯酸的线性尺寸变化大。结论：应提倡采用上述方法缓慢冷却，以更好地适应义齿基托的粘膜适应性。

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